The white mark allowed for a manual RPM check on this big steel flywheel on the ground floor. Note how dark the bottom level of the mills is—that’s because all of the equipment is blocking out the light.
Aluminum spools replaced their wooden counterparts, later in the factory’s history.
Gold, which has a relatively high mass, would drop through the slats of the sluice boxes as the water flowed over them. Around the dredge were a half dozen radiator pipes to keep the water flowing through the machines.
Some of the plants growing out of the walls of the power plant.
Pillsbury from across the Mississippi River and Stone Arch Bridge from the roof of the Washburn Crosby Elevator (aka Gold Medal Flour).
One of the machines left over in the underground magnetic separation plant.
On my first self-guided tour, the calculator was caught my eye because it was one of the few things left behind in the laboratories that filled the second floor. On my next trip, it had been smashed to pieces.
The middle section of the smokestacks were coal hoppers, and this device would load the coal into the hoppers from the conveyor belt it rode across. The bottom section of the stacks were storage rooms while the very top were, surprise, chimneys for the power plant.
Compressors and turbines over the Eagle River.
One side of the street is demolished. The other is not.